Why DVD-RAM?
Which DVD Format to choose? DVD-RAM!
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| LM-AF120LSDE DVD-RAM Disc with Hard Coating |
Panasonic has chosen DVD-RAM for all of its DVD recorders. DVD-RAM is the standard format established by the DVD Forum for recording both video and PC data. DVD-RAM offers easy recording and free, on-the-fly editing, and it has the superior data handling you need in today's digital age. A DVD recorder's features and performance vary greatly with the type of disc used. If you want to make the right choice, start by learning all that you can about DVD-RAM and the other types of DVD discs.
Types of Recordable DVD Media
There are five distinct recordable DVD formats, including both write-once and rewritable formats. Three of which are certified by the DVD Forum, these are DVD-RAM, DVD-R & DVD-RW.
To find out more about the Manufacturers DVD Forum and DVD Technology Click Here
Features of DVD Disc Formats.
| Standards Established by the DVD Forum | Not Certified by the DVD Forum |
|---|
| DVD-RAM | DVD-R | DVD-RW | +R | +RW |
| Capacity | | | | | |
| (Double Sided) | 9.4GB | 9.4GB | - | - | - |
| (Single Sided-Double Layers) | - | - | - | 8.5GB | 8.5GB |
| (Single Sided) | 4.7GB | 4.7GB | 4.7GB | 4.7GB | 4.7GB |
| Verification Function (for a sure data storage) | Yes | No | No | No | No |
| OS Support | Yes - Windows® XP Support | No | No | No | No |
| Drag & Drop (Just like a Hard Disc Drive) | Yes - Windows® XP Support | No | Yes - Application Software is required | No | Yes - Application Software is required |
| Quick Format | 10 sec. | n/a | 26 sec. | n/a | 2 min 6 sec. |
| Finalize | Not Necessary | n/a | 48 sec. | n/a | 9 sec. |
| Disc Surface Protection | Yes - Cartridge Type is Optional also Pro Hard Coating is Available | No - Bare Disc Only | No - Bare Disc Only | No - Bare Disc Only | No - Bare Disc Only |
| Data Transfer Rate (Basic spec.) | 22.16Mbps | 11.08Mbps | 11.08Mbps | 11.08Mbps | 11.08Mbps |
| Recording System | Non Linear | Linear | Non Linear | Linear | Linear |
| Fast Random Access | 64 address/32kB | 4 address/32kB | 2 address/32kB | 16 address/32kB | 16 address/32kB |
| (Header address) | (Distributed address) | (Distributed address) | (Distributed address) | (Distributed address) |
| Rotation Speed | ZCLV*1 | CLV*2 | CLV*2 | CLV*2 | CLV*2 |
| Re-Writable Times | 50,000 - 100,000 | 1 | Approx. 1,000 | 1 | Approx.1,000 |
| Availability of 8cm Disc (approx. 3'' ) | Yes | Yes | Yes | No | No |
| Defect Management System | Yes | No | Available - Application Software is required | No | No |
| AV-PC Compatibility (VR mode) | Yes - TV program, Still Picture, DV Footage, PC data | No | No | No | No |
| CPRM (Content Protection for Recordable Media) | Yes | No | Yes | No | No |
| Recording without border in /out writing | Yes | No | No | No | No |
*1 ZCLV = Zoned Constant Linear Velocity System
*2 CLV = Constant Linear Velocity System
What is DVD-RAM?
Recordable DVD - the ultimate solution for your various digital needs, video recorder, PC and camcorder applications. The recording media for the next generation is already here today. It's DVD-RAM - an advanced format that lets you enjoy the many applications of digital data, including moving pictures, still images, PC data and more. DVD-RAM makes it easy to handle data transfer over the Internet. DVD-RAM makes it easy to link mobile equipment. And DVD-RAM's applications will continue to expand as technology evolves. DVD-RAM offers a host of exciting benefits today, and it will offer even more tomorrow. Read on to learn more about the remarkable functions made possible by DVD-RAM.
DVD-RAM Main Features
- 1. High-Speed Read & Write
Direct On-Disc Editing - Editing is quick and easy, DVD-RAM lets you edit video directly on the disk. With digital images and sound, not to mention interactivity, the AV world is undergoing dramatic changes. At the same time, computers are incorporating aspects of audio-video entertainment. Both situations call for vast data storage capacity and speedy transfer. DVD-RAM not only handles huge volumes of data, it also has the high-speed (22.16 Mbps) read/write capability today's digital applications demand.
Still Images, Video and other Data on the same disc. You can store both digital snapshots and digital video footage and also pc data files on the same DVD-RAM disc. This makes DVD-RAM a very useful transfer media between multiple devices.
DVD-RAM uses preaddressed sectors for data management. The CAPA (Complementary Allocated Pit Addressing) system records address signals in each of the sectors so the pickup can go directly to the sector where desired information is stored. And rapid retrieval is possible even if data isn't stored sequentially. With the conventional CLV (Constant Linear Velocity) system, disc rotation speed control is required after the data track changes, which takes time. But DVD-RAM uses the ZCLV (Zoned Constant Linear Velocity) system enabling reading of data in the same zone* at a uniform rotation speed to achieve high-speed random access. Thanks to this rapid access, you're assured stress-free operation.
* Zone is a set of tracks.
- 4. Durable Storage Performance
Data on a DVD-RAM disc is read by a non-contact optical pickup, so there's virtually no wear or tear that could alter performance over time. Discs enable rewriting approximately 100,000 times. They also come with cartridges* to protect them from dirt and dust. These features make DVD-RAM the ideal medium for storing your valuable data.
* Some DVD-RAM discs come without a cartridge.
- 5. Outstanding Reliability
DVD-RAM uses the land-groove recording system which enables high-precision tracking by the pickup, thereby maintaining stable reading and writing of data. To assure accurate data storage and retrieval, DVD-RAM also incorporates an advanced defective management and error correction system.
DVD-RAM support sophisticated copyright protection technology called CPRM (Content Protection for Recordable Media). Among other things, this allows content such as movie videos to be distributed with copying limited to one time only. DVD-RAM's potential for new content distribution is enormous.
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